为充分利用太阳能资源、提高太阳能系统综合效率,本文以乌鲁木齐地区用于地板供暖的太阳能热水系统为工程背景,对3个具有不同顶部结构或隔板结构的蓄热水箱内流动与传热过程进行了数值分析,并对各水箱的交替运行模式进行了探讨。结果表明：不同时刻采用多水箱交替运行的模式是可行的。实际工程中,在满足热用户需求的前提下,应优先采用小流量的运行模式。根据水箱的热分层特性,11:30优先运行3#水箱,其次为2#、1#水箱；15:00和18:00优先运行3#水箱,1#和2#水箱互为备用。3#水箱更适用于对水温要求较高但用水量不大的用户,其次为1#水箱,当用户端回水量较大且用户需要较高温度的热水时优先启用2#水箱。

The fluid flow and heat transfer processes inside three thermal storage tanks with different top or obstacle structures are numerically analyzed in this paper to take advantage of solar energy and improve the comprehensive efficiency of solar energy system with the engineering background of Urumqi region"s solar water heating system for floor heating. The alternate operation mode of each water tank is also discussed. The results show that it is feasible to use the multi-tank alternating operation mode at different times. In actual engineering, on the premise of meeting the needs of hot users, the low-flow operation mode should be preferentially adopted. According to the thermal stratification characteristics of the water tank, 3# water tank is preferentially operated at 11:30, followed by 2# and 1# water tanks. 3# water tank should be preferentially operated at 15:00 and 18:00 while 1# and 2# water tanks can be used as backup for each other. The 3# water tank is more suitable for users with higher water temperature requirements but less water consumption, followed by the 1# water tank. When users generate a lot of backwater and need hot water with higher temperature, the 2# water tank is preferentially enabled.

TU822

国家自然科学基 金(51476073, 51266004)；兰州交通大学大学生创新创业训练计划项目(2019120)